Pick.



PATENT-ED FEB. 26, 1907;

T. A. LUTZ.

PIGK.

.APPLIGATI ON FILED 3330.10, 1906.

WITNESSES THE NORRIS PEYERS c f/wmJAZzziz,

ZINVENIOR A TTO'RNE V5 0., WASH N, n. c.

THOMAS A. LUTZ, OF WINBURNE, PENNSYLVANIA.

PICK.

Specification of Letters Paten Patented Feb. 26, 1907.

Application filed December 10, 1906. Serial No. 347,134:-

To all whom it may concern.-

Be it known that I, THOMAS A. LUTZ, a citizen of the United States, residing at Win burne, in the county of Clearfield and State of Pennsylvania, have invented a new and useful Pick, of which the following is a specification.

This invention relates to certain new and useful improvements in picks; and the object of the invention is to provide a pick particularly adapted for use in coal-mines or other places where a pick is used in working hard material.

In the accompanyings drawing, Figure 1 is a side view, partly in section, of a pick con structed in accordance with this invention; and Fig. 2 is a view of the same with the point detached.

Referring to the drawings, the head 1 of the pick is shown provided with the usual eye 2.

The inner edge of said head is symmetrically shaped to form shoulders 3, each side of said eye with flat inner faces 4 converging toward the outer edge of the head. One end of the pick is formed with a detachable point 5, which is secured to the head of the pick by means of a reduced inner end forming a tapering shank 6, terminating in a straight screw-threaded end 7, adapted to receive a nut 8, said tapering shank being adapted to fit into a corresponding tapering socket 9, provided therefor in the head of the pick between the outer end thereof and the innerface of the shoulder upon the inner edge of said head. The screw-threaded end of said tapering shank projects inwardly from the socket n the head of the pick to receive the nut by means of which the shank is secured rigidly in its socket. By this construction a very rigid connection is made between the point and the head of the pick, and yet at any time the point of the pick may be very easily and quickly removed for reforging or grinding or for replacement.

It is not new to provide picks with removable points nor to provide such removable points with tapering shanks; but it is consid ered new to provide a device of this character without recesses or projecting shoulders upon the outer edge of the pick, such recesses or shoulders tending to weaken the pick structurally and to interfere in its use.

In the use of a pick operated under normal conditions the stress of the blow is downward in the direction of the length of the head of the pick; but there is also a dragthe head as it approaches the eye employed for the reception of the handle, and in order to provide for the removal of the point of the pick herein described it has been found necessary to preserve the continuity of the outer or front side of the pick-head from one end thereof to the other to form shoulders 3 prac tically outside of the line of the inner edge of the head, so that any dragging tendency of the end of the point will be amply resisted,

such strain tending to compress that portion of the head which, as above indicated, is continuous. To aid in this disposition of the shoulder practically without the line of the inner side of the pick-head, it has been found desirable to deflect the threaded terminal portion of the shank from the axial line of the polygonal tapered portion, as clearly indicated in the drawings; but owing to the tapered socket there is no difliculty experienced in inserting the shank, notwithstanding its deflected terminal. Moreover, the terminal deflection of the shank serves to relieve the nut to a great extent of the strain or jar due to the use of the pick and insures the communication of the impact to the tapered walls of the socket.

Having thus described the invention, what is claimed, and desired to be secured by Letters Patent, is

1. A pick-head having a continuous outer side and provided at its inner side on opposite sides of the eye with inwardly-projecting obliquely-disposed shoulders, the ends of the arms of the head being provided with polygonal sockets tapered toward and terminating at said shoulders, and removable points having polygonal tapered shanks in said sockets and terminally threaded for engagement by nuts bearing upon said shoulders.

2. A pick-head having a continuous outer side and provided at its inner side on opposite sides of the eye with inwardly-projecting obliquely-disposed shoulders, the ends of the arms of the head being provided with polygonal sockets tapered toward and terminating at said shoulders, and removable points having polygonal tapered shanks in said sockets and terminally threaded for engagement by In testimony that I claim the foregoing as nuts bearing upon said shoulders, the termimy own I have hereto aflixed my signature in nal portions of said shanks being deflected the presence of tWo Witnesses.

angularly from the axis of the polygonal por- THOMAS A. LUTZ. 5 tion of the shank to permit of the location of Witnesses:

the shoulder practically Without the inner L. K. REESE, line of the pick-head. l A. V. HIPPLE. 

